Chilkat Examples

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(C#) Facebook Upload Photo from Local File

Uploads a new photo with a caption from a local file.

Chilkat .NET Downloads

Chilkat .NET Assemblies

Chilkat for .NET Core

Chilkat for Mono

// This example assumes Chilkat HTTP to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

Chilkat.HttpRequest req = new Chilkat.HttpRequest();
req.HttpVerb = "POST";
req.ContentType = "multipart/form-data";
req.Path = "/v2.7/me/photos";

// Use the previously obtained access token.
// Note: The publish_actions scope is required to upload a photo.
req.AddHeader("Authorization","Bearer FACEBOOK-ACCESS-TOKEN");

// Send an "Expect: 100-continue" header in the request.
// This causes the HTTP server to end a 100-continue response
// immediately after receiving the HTTP header.  The client
// (Chilkat) will receive this intermediate response, and if
// it's not an error response, it knows that the HTTP server will
// accept the data that is forthcoming.
// The alternative is to get an error response after trying to upload
// the entire contents of the files.
req.AddHeader("Expect","100-continue");

// Set a photo caption.
req.AddParam("caption","Here are some penguins!");

// Additional parameters can be added to the request by 
// calling AddParam once per parameter.  
// See https://developers.facebook.com/docs/graph-api/reference/user/photos
// for more information about other optional parameters.

// Indicate the local file to be uploaded.
bool success = req.AddFileForUpload("source","qa_data/jpg/penguins2.jpg");
if (success != true) {
    Debug.WriteLine(req.LastErrorText);
    return;
}

// Upload the image file..
Chilkat.HttpResponse resp = http.SynchronousRequest("graph.facebook.com",443,true,req);
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

// Examine the response body:
string responseJson = resp.BodyStr;
Debug.WriteLine(responseJson);

// The response contains JSON, such as this:
// {"id":"10210224963435862","post_id":"10224048320139890_10210224963435862"}


 

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